A battery energy storage system

Abstract

The embodiment of the utility model discloses a battery energy storage system, including a container of preset size and a first preset number of battery packs arranged in the container; the battery packs are placed in the container in an array of a first number of rows and a second number of columns, the first preset number of battery packs are divided into a second preset number of battery clusters, and the cluster voltage of each battery cluster is within a preset voltage range; the first connecting wire group of each battery pack is arranged along the back plate of the container. The utility model arranges part of the connecting wires of the battery packs at the back plate of the container to arrange the number of battery packs that can reach the preset voltage range in the container, thereby solving the technical problems of low integration, low energy density, large DC side current and large loss in the container-type battery energy storage system in the prior art, and achieves the technical effects of improving the integration of the battery system, improving energy density, increasing DC side voltage, reducing DC side current and reducing loss.

Description

Technical Field

[0001] The embodiment of the utility model relates to the field of energy storage technology, and in particular to a battery energy storage system. Background Art

[0002] The existing DC battery energy storage system solution for energy storage is based on a 1kV or 1.5kV voltage platform. The total voltage of the battery pack is raised to below 1.5kV by connecting the battery pack in series. The battery power is converted into AC through an inverter and output to the load or grid connection point. This method has low integration, low energy density, large DC side current and limited room for overall cost reduction. Utility Model Content

[0003] The embodiment of the utility model provides a battery energy storage system, which solves the technical problems of low integration, low energy density, large DC side current and large loss in the containerized battery energy storage system in the prior art.

[0004] The embodiment of the utility model provides a battery energy storage system, the battery energy storage system comprising a container of a preset size and a first preset number of battery packs arranged in the container;

[0005] The battery packs are placed in the container in an array of a first number of rows and a second number of columns, the first preset number of battery packs are divided into a second preset number of battery clusters, and the cluster voltage of each of the battery clusters is within a preset voltage range;

[0006] The first connection line group of each battery pack is arranged along the back plate of the container, wherein the first connection line group at least includes a power distribution line, a fire detection line, and a communication connection line of the battery pack.

[0007] Furthermore, the battery energy storage system further includes a control host, and the control host is arranged on a side of the container;

[0008] The control host is electrically connected to the temperature sensor and the gas detector provided on each of the battery packs through the fire detection line.

[0009] Furthermore, the battery energy storage system also includes a combiner cabinet, which is arranged on a side of the container, and the second connecting line group of each battery pack is connected to the combiner cabinet through the bottom wire groove of the container, wherein the second connecting line group includes at least the positive charge and discharge line and the negative charge and discharge line of the battery pack.

[0010] Furthermore, the battery energy storage system also includes a fire protection system, which includes a plurality of fire protection connecting pipes, and the fire protection connecting pipes are arranged on the top of the container.

[0011] Furthermore, the fire protection system further comprises a plurality of spray valves, and the plurality of spray valves are correspondingly connected to the fire protection connection pipeline;

[0012] A third preset number of the spray valves is arranged to cover one battery cluster.

[0013] Furthermore, the fire protection system also includes a fire protection gas cylinder, which is arranged at the junction cabinet, the spray valve is connected to the fire protection gas cylinder through the fire protection connecting pipeline, and the fire protection gas cylinder is connected to the control host.

[0014] Furthermore, the battery energy storage system includes a battery rack, which is arranged in the container, and the battery pack is placed on the battery rack.

[0015] Furthermore, the battery energy storage system further comprises a liquid cooler and a water cooling pipeline; the liquid cooler is connected to the water cooling pipeline;

[0016] The liquid cooler is arranged on one side of the back plate of the container; the water cooling pipeline is arranged along the battery rack.

[0017] Furthermore, the first preset number is 60, and the 60 battery packs are placed in the container in an array of 10 rows and 6 columns;

[0018] The second preset number is 12, and the 60 battery packs are divided into 12 battery clusters, and the cluster voltage of each battery cluster is within a preset voltage range of 1.5kV-2kV.

[0019] The embodiment of the utility model discloses a battery energy storage system, including a container of preset size and a first preset number of battery packs arranged in the container; the battery packs are placed in the container in an array of a first number of rows and a second number of columns, the first preset number of battery packs are divided into a second preset number of battery clusters, and the cluster voltage of each battery cluster is within a preset voltage range; the first connecting wire group of each battery pack is arranged along the back plate of the container, wherein the first connecting wire group includes at least a power distribution line, a fire detection line, and a communication connecting wire of the battery pack. The utility model arranges part of the connecting wires of the battery pack at the back plate of the container to arrange a number of battery packs that can reach the preset voltage range in the container, thereby solving the technical problems of low integration, low energy density, large DC side current and large loss in the container-type battery energy storage system in the prior art, and achieving the technical effects of improving the integration of the battery system, improving energy density, increasing DC side voltage, reducing DC side current and reducing loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of a battery energy storage system provided by an embodiment of the utility model;

[0021] Figure 2 It is a structural diagram of a battery energy storage system provided by an embodiment of the utility model;

[0022] Figure 3 It is a side view of a battery energy storage system provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0024] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the utility model are used to distinguish different objects, rather than to limit a specific order. The following embodiments of the utility model can be implemented separately, and the embodiments can also be implemented in combination with each other, and the embodiments of the utility model do not make specific limitations on this.

[0025] Figure 1 It is a front view of a battery energy storage system provided by an embodiment of the utility model.

[0026] like Figure 1 As shown, the battery energy storage system includes a container 10 of a preset size and a first preset number of battery packs 20 arranged in the container; the battery packs 20 are placed in the container 10 in an array form of a first number of rows and a second number of columns, and the first preset number of battery packs 20 are divided into a second preset number of battery clusters, and the cluster voltage of each battery cluster is within a preset voltage range; the first connecting line group of each battery pack 20 is arranged along the back panel of the container 10, wherein the first connecting line group includes at least the distribution line, the fire detection line, and the communication connection line of the battery pack.

[0027] Specifically, in order to increase the DC side voltage of the battery energy storage system, it is necessary to arrange more battery packs 20 in a container 10 of a preset size. Therefore, some connecting wires of the battery pack 20 including distribution lines, fire detection lines, communication connection lines, etc. (i.e., the above-mentioned first connecting wire group) are arranged on the back plate of the container 10. This can reduce the longitudinal space of the container 10, so that more battery packs 20 can be arranged.

[0028] The utility model routes some of the connecting wires of the battery pack on the back plate of the container so as to arrange a number of battery packs in the container that can reach a preset voltage range, thereby solving the technical problems of low integration, low energy density, large DC side current and large loss in the container-type battery energy storage system in the prior art, and achieving the technical effects of improving the integration of the battery system, improving the energy density, increasing the DC side voltage, reducing the DC side current and reducing the loss.

[0029] For example, Figure 1 As shown, the first preset number is 60, and the 60 battery packs 20 are placed in an array of 10 rows and 6 columns in the container 10; the second preset number is 12, and the 60 battery packs 20 are divided into 12 battery clusters, and the cluster voltage of each battery cluster is within the preset voltage range of 1.5kV-2kV.

[0030] Specifically, in order to achieve a cluster voltage of 2kV, 60 battery packs can be set, among which 112 lithium iron phosphate batteries are connected in series as a battery pack, and 5 battery packs are connected in series as a cluster. The voltage parameter of the entire cluster is in the range of 1568~2016V, that is, the above-mentioned 1.5kV-2kV. 12 clusters of batteries (that is, 60 battery packs are divided into 12 battery clusters) are arranged in a container with a preset size of 20 feet (the length, width and height of a 20-foot container are approximately 5.89 meters, 2.35 meters, and 2.39 meters). The total installed capacity can reach 6795kWh. Compared with the current battery energy storage system, the energy density is increased by 35%, the comprehensive cost is reduced, and the system layout is compact, achieving the effect of improving energy density and improving integration; in this way, the DC side voltage is increased, so that the total current of the system is reduced, and the reduction in current reduces the total heat generation of the main circuit, thereby reducing losses.

[0031] Optionally, the battery energy storage system further includes a control host ( Figure 1 The control host is not shown in the figure), and the control host is arranged on one side of the container; the control host is electrically connected to the temperature sensor and gas detector arranged on each battery pack 20 through the fire detection line.

[0032] Specifically, each battery pack 20 is provided with a temperature sensor and a gas detector, which are connected to the control host via the fire detection line in the first connecting line group. The temperature sensor and the gas detector are used to detect the current temperature of the battery pack 20 and whether there is gas overflow in real time, and transmit the detection result to the control host. If the control host determines based on the detection result that the temperature of the battery pack 20 rises abnormally, or the overflowed gas reaches a certain amount, the fire protection system of the battery energy storage system is controlled to perform corresponding actions to spray the entire battery cluster where the corresponding battery pack 20 is located.

[0033] Figure 2 It is a structural diagram of a battery energy storage system provided in an embodiment of the utility model. Figure 3 It is a side view of a battery energy storage system provided by an embodiment of the utility model.

[0034] Alternatively, if Figure 2 and Figure 3 As shown, the battery energy storage system also includes a junction cabinet 30, which is arranged on a side of the container 10. The second connecting line group of each battery pack 20 is connected to the junction cabinet 30 through the bottom wire groove of the container 10, wherein the second connecting line group includes at least the positive charge and discharge line and the negative charge and discharge line of the battery pack 20.

[0035] Specifically, the junction box 30 arranged on the output side of the container 10 is a DC junction box. The second connecting wire group extends along the battery rack where the battery pack 20 is placed to the bottom wire trough of the container 10, and is finally connected to the junction box 30 via the bottom wire trough. The second connecting wire group is a DC cable, which is connected to an external inverter through the junction box and converted into AC power for standby use.

[0036] Alternatively, if Figure 2 As shown, the battery energy storage system also includes a fire protection system, which includes a plurality of fire protection connecting pipes 41 , and the fire protection connecting pipes 41 are arranged on the top of the container 10 .

[0037] Optionally, the fire protection system further comprises a plurality of spray valves, and the plurality of spray valves are correspondingly connected to the fire protection connection pipeline 41; and a third preset number of spray valves is correspondingly arranged to cover one battery cluster.

[0038] Optionally, the fire protection system further includes a fire protection gas cylinder, which is arranged at the junction cabinet 30, and the spray valve is connected to the fire protection gas cylinder through the fire protection connecting pipeline 41, and the fire protection gas cylinder is connected to the control host.

[0039] Specifically, the fire-fighting gas cylinder is connected to the control host. When the control host determines that the temperature of a battery pack 20 rises abnormally, or the overflowed gas reaches a certain amount, the fire-fighting gas cylinder is controlled to open, and at the same time, the third preset number of spray valves corresponding to the battery cluster where the corresponding battery pack 20 is located are controlled to open, so as to achieve spraying of the entire battery cluster where the corresponding battery pack 20 is located.

[0040] Alternatively, if Figure 1 and Figure 2 As shown, the battery energy storage system includes a battery rack 50 , which is disposed in the container 10 , and the battery pack 20 is placed on the battery rack 50 .

[0041] Alternatively, if Figure 2As shown, the battery energy storage system also includes a liquid cooler 60 and a water cooling pipeline (the water cooling pipeline is not shown in the figure); the liquid cooler 60 is connected to the water cooling pipeline; the liquid cooler 60 is arranged on one side of the back plate of the container; the water cooling pipeline is arranged along the battery rack 50.

[0042] Specifically, the liquid cooler 60 circulates the coolant along the battery rack 50 through the water cooling pipeline to cool or heat the battery pack 20 .

[0043] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Finally, it should be noted that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A battery energy storage system, characterized in that: The battery energy storage system includes a container of a preset size and a first preset number of battery packs arranged in the container; The battery packs are placed in the container in an array of a first number of rows and a second number of columns, the first preset number of battery packs are divided into a second preset number of battery clusters, and the cluster voltage of each of the battery clusters is within a preset voltage range; The first connection line group of each battery pack is arranged along the back plate of the container, wherein the first connection line group at least includes a power distribution line, a fire detection line, and a communication connection line of the battery pack.

2. The battery energy storage system according to claim 1, characterized in that: The battery energy storage system further includes a control host, which is disposed on a side of the container; The control host is electrically connected to the temperature sensor and the gas detector provided on each of the battery packs through the fire detection line.

3. The battery energy storage system according to claim 2, characterized in that: The battery energy storage system also includes a combiner cabinet, which is arranged on a side of the container. The second connecting line group of each battery pack is connected to the combiner cabinet through the bottom wire groove of the container, wherein the second connecting line group includes at least the positive charge and discharge line and the negative charge and discharge line of the battery pack.

4. The battery energy storage system according to claim 3, characterized in that: The battery energy storage system also includes a fire protection system, which includes a plurality of fire protection connecting pipes, and the fire protection connecting pipes are arranged on the top of the container.

5. The battery energy storage system according to claim 4, characterized in that: The fire protection system further comprises a plurality of spray valves, and the plurality of spray valves are correspondingly connected to the fire protection connection pipeline; A third preset number of the spray valves is arranged to cover one battery cluster.

6. The battery energy storage system according to claim 5, characterized in that: The fire protection system further comprises a fire protection gas cylinder, which is arranged at the junction cabinet, the spray valve is connected to the fire protection gas cylinder through the fire protection connecting pipeline, and the fire protection gas cylinder is connected to the control host.

7. The battery energy storage system according to claim 1, characterized in that: The battery energy storage system includes a battery rack, which is arranged in the container, and the battery pack is placed on the battery rack.

8. The battery energy storage system according to claim 7, characterized in that: The battery energy storage system also includes a liquid cooler and a water cooling pipeline; the liquid cooler is connected to the water cooling pipeline; The liquid cooler is arranged on one side of the back plate of the container; the water cooling pipeline is arranged along the battery rack.

9. The battery energy storage system according to claim 1, characterized in that: The first preset number is 60, and the 60 battery packs are placed in the container in an array of 10 rows and 6 columns; The second preset number is 12, and the 60 battery packs are divided into 12 battery clusters, and the cluster voltage of each battery cluster is within a preset voltage range of 1.5kV-2kV.

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